PTFE Moulded and Machined Finished Products
It is often more efficient to use moulded semi - finished products to avoid excessive machining of relatively expensive materials and also to reduce machining labour and time.

It is used as a gasket on flanged connections, pressure vessels and all other similar mating faces as well as packing for valves and similar gland applications.

Dia

1.5 - 19 mm

Length

5000 - 1000 mm

Available SQUARE/ROUND SECTIONS.

IPTFE Thread Sealant Tape
Unsintered pure PTFE in tape form is the standard material for sealing threaded joints and connections. Joints can be taken apart long afterward without any trouble. It is virtually a universal sealing material which can be used on pipes of galvanised Iorn, Rubber, Copper, Plastics, Brass, Aluminium, Stainless Steel, Ceramic, Monel, Carbon etc.

The inherent plasticity of PTFE allows it to extrude into the irregularities of the thread, so filling any voids or passages. It is insert to acids, solvents, oil etc. and will not contaminate the liquid being handled.

These gaskets are successfully used in chemical plants, glass/glass lined equipment due to their high temperature, corrosion and ageing resistance. Envelop Gaskets are produced in two forms:-

Milled and Slit forms
Milled type envelop is perhaps the better of the two since it is made to fit the insert and presents a flat face to the flange.
The Slit type is perfectly adequate for many applications where cost is a major consideration. The envelop in this variety does not present a full face to the flange.
Solid Gaskets can be made to order in different types of shapes and sizes.

The use of fillers with PTFE changes certain properties and permits the material to be tailored to a wide variety of mechanical applications. In general, use of additives increases stiffness, hardness, compressive strength and resistance to deformation under load.

We manufacture these rings for all types of non-lubricated compressors.

Extensively in Pharmaceutical / Food / Chemical Industry where a high standard of cleanliness and purity is required.

The almost universal chemical resistance, the high temperature resistance, the anti-stick, low friction surface of the PTFE Linings ensure minimum maintenance requirements. Low cost and efficient design along with long service life makes PTFE the most ideal material for use in valve and pump diaphragms.

Introduction:
Flex-O-Seal is a unique sealing material manufactured from special grade of expanded 100% pure PTFE by transforming the fibrous structure by means of a special process. Though very tough, it is spongy and suited to almost all flanges, covers and narrow cavities. Its special soft and flexible character enables it to be the most ideal seal under pressure without significant cold flow even on irregular, badly damaged or corroded flange surfaces. Once bolted this gasket rarely need to be retorqued.

Properties: FLEX-O-SEAL recommended temperature-240°C, to 310°C, PH Range 0-14 No deterioration due to stocking for long time. Resistant to high pressure, non-toxic.
Not recommended for use against elemental fluorine, alkali metals and strong oxidising agents.

The sealing surface must be clean, free from grease and dry to enable the gasket to stick properly.

The width of the joint gasket is to be determined by the nominal diameter or type of flange. Selection of a tentative size of joint gasket would be approx, 1/3rd flange contact width inside the bolt hole e.g., 7 mm gasket joint to suit a 20 mm flange width.

Remove the protective foil from the adhesive joint gasket to allow for fitting. Stick the gasket approx 2 mm away from the bolt hole and press on lightly.

Do not butt the ends overlap them in front of a bolt (see fig. 1)

Tighten the lubricated bolts in opposite pairs. Since it is highly compressible only bolt pressure is required to seal. The lap joint deforms perfectly to give a reliable seal.

For delicate components such as glass flanges the gasket ends can be joined by cutting a step in each end of gasket.

FLEX-O-SEAL is easy to install, able to fill severe surface irregularities and reduces inventory of ready made gaskets, envelopes, etc. It has therefore taken its name as UNIVERSAL JOINT GASKET.

On irregular or damaged flanged surfaces, it is possible to build up with short length of FLEX-O-SEAL.

Standards Spools

Gasket Widthmm

Thickness mm

Spool length meter

3

1.5

30

5

2.0

20

7

2.5

15

10

3.0

8

14

5.0

5

17

6.0

5

20

7.0

5

25

10.0

5

Other sizes on request

All technical data and information is based on our experience to date. They represent the current state of our knowledge but assume no legal re-sponsibilities. The customers are asked to check these details since the performance of a seal can be judged only where all necessary operating data are available.

Bellows are specially designed form virgin PTFE and is contour moulded. This manufacturing method guarantess an excellent structure of the material; Symptoms of ageing are practically excluded. Very long term durability and low maintenance costs are assured.

These Bellows are manufactured in different sizes form NB 25mm to NB 500mm. The allowable operating pressures are depending on services conditions. The Bellows can be used upto200oC.

Bellows serve for compensation of:

Vibration

Thermal Strain and Expansion

Axial and Redial motion

These Bellows are meant for resisting highly corrosive chemicals plants and piping for aggressive medias.
These Bellows are installed in PTFE Lined Carbon Steel Piping and equipment without additional gaskets. For use with piping and equipment made of glass, enamels and ceramics we recommend PTFE Gaskets, offered as accessory.

The sealing surfaces are covered end plates and individually boxed for protection against mechanical damage. Limit bolts are preset to prevent over extension during operation.

Grafseal Tape
An advanced and adaptable valve stem/pump shaft packing material used for gland or stuffing box packing at site. The self winding method and forming the required size of the gland packing at site is very practical and simple, especially as any dimension can be prepared quickly.

Method: A Pre-determined length of tape depending upon the radial width (the space between stem or shaft and the cylinder bore) is wrapped around the stem or shaft until the stuffing box is filled. The wound tape is then pushed down into the stuffing box and compressed to half its width by close fitting split pushers and the gland follower. With the help of a scale before and after compression of tape, the packing mechanic will be able to judge the extent of compression achieved. The stem or shaft under gland load should be turned every time before the next ring is formed. This process is repeated till the depth of the stuffing box is full.

SPITMAAN GRAFSEAL TAPE has infinite shelf life and can be kept in readiness in every store as a part of the maintenance kit. By using the tape the inventory of preformed rings of different types and cross sections can be reduced to a minimum, offering advantages with regard to maintenance and repair work.

GRAFSEAL Tape brings down the inventory to only a few rolls of tape of different thicknesses and widths. These Tapes are also available with adhesive backing to form gaskets on a " Do It At Site " basis.

Grafseal Formed PackingsAdvantages in use of Formed Packings
Due to its multifarious properties GRAFSEAL enables variety of packing materials to be reduced resulting in saving in storage and inventory costs.

GRAFSEAL Packings are self lubricating, with the result wear on moving parts will be minimum.
As a result of the high thermal dissipation property, it is not necessary to have gland cooling arrangement. This results in saving of operational cost.

When GRAFSEAL Packings are used, it is not necessary to remove the complete packing from stuffing box, even when it is compressed after prolonged use. Due to the exceptional characteristics of the material GRAFSEAL does not harden or undergo any change, affecting its sealing efficiency. Therefore, only adding one additional ring to the stuffing box solves the problem. The use of GRAFSEAL packing minimises downtime as compared to conventional packing.

GRAFSEAL Packing Rings are recommended for use in valves and pumps handling heat transfer fluids, oils, acids, alkalies, solvents, hot water, boiler feed water, hydrocarbon products as well as super heated high pressure steam. GRAFSEAL Packing are excellent for Nuclear Services. The "Chloride content" of this packing is kept much below the permissible values. In radiation atmosphere, especially the packing mechanic will be able to spend limited time for packing valves and pumps. Precision moulded packing will therefore be safer and advantageous.

It is not only the pump and valves manufacturers who draw benefit of this cost-saving GRAFSEAL ready made Rings, but also other actual users who realising the importance of preformed Rings have standardized their requirements, on this packing Pre-formed GRAFSEAL rings have distinct advantages as compared to preparing the rings from Tape on a " Do It At Site " basis.

Some of the shortcomings in using the Tape are :

lack of uniform winding tension, due to physical obstruction in one particular orientation,

or the slippery nature of the product when handled by greasy hands,

the time consuming necessity to compress and tighten the gland followers each time.

On the other hand, ready made rings are formed in such a way that they fit exactly into the space provided for them. They possess sufficient compressibility and resiliency. These rings have uniform density, smooth finish, close tolerance and also save labour and wastage. Due to their special construction, formed packing rings offer uniform axial and radial expansion.

GRAFSEAL Packings are designed to provide optimum seal efficiency. These packings are precision made; and need careful installation. Stuffing boxes should be in a sound condition. Stuffing box and shaft or spindle surface should be absolutely clean and smooth. The gap between the shaft and the housing at the bottom of the stuffing box should not exceed 0.5 mm. Before putting a Valve or pump into operation, the spindle or shaft should be checked for freedom of rotation. In case it is too tight slacken off the gland sightly. If there is a leakage, reduce it by gradually tightening the gland. In case of very high pressure applications, it may be necessary to add one more ring to the stuffing box.

For best results, special top and bottom header rings are recommended with the packing set especially when the packings are subject to extremes of high pressure conditions or in case of excessive clearances. These header rings prevent extrusion and act as wipers to prevent particle transfer.

While ordering GRAFSEAL Packing Rings, service conditions viz., temperature, pressure, and the medium to be sealed should be indicated.
GRAFSEAL Packing Rings are supplied in three forms, endless, split and in two halves.

Grafseal Gaskets
GRAFSEAL Gaskets are premium products for flanges capable of withstanding extremes of temperature and pressure. These gaskets are also suitable for flanges of enamel or glass. GRAFSEAL Gasket will not damage these sensitive flanges, as it contains no binder or filler and its characteristics remain constant.

Properties:

The resiliency and compressibility of the Gasket is excellent; it can easily adapt to any flange irregularities even at low surface pressures. If the GRAFSEAL Gasket is compressed further during assembly, resiliency increases with the result that the gasket can behave dynamically from cryogenic to molten metal temperatures (-200°C to +3000°C).

Even with frequent temperature and load changes or vibrations, GRAFSEAL Gaskets remain dimensionally stable and provide a complete leak proof joint without embitterment or hot/cold flow characteristics. It is possible to seal even flanges which are corroded or pitted with GRAFSEAL Gasket without spending time working over the flange. These gaskets have extraordinarily good thermal stability and co-efficient of expansion similar to Steel. Non- metallic gaskets are recommended for pressures upto 200 kg/cm2 and metallic gasket upto 800 kg/cm2.

The high performance characteristics of GRAFSEAL Gaskets ensure operational efficiency, longer life, reduced maintenance and hence they are economical to use when compared to conventional gasket materials.

These gaskets have no ageing characteristics and remain leak proof under moderate bolt loads and do not require precision bolt tightening.

Grafseal Universal Adhesive Gasket Tape
GRAFSEAL gasket tape, an all graphite product, is self adhesive. It has extremely good elasticity, compressibility and can form a perfect seal even at elevated temperatures and pressures generally encountered in the industry. It is an acknowledged fact that GRAFSEAL adhesive tape has universal applications since maintenance personnel can fabricate gasket on flanges in the site itself of the required size and shape. The inventory is brought down to a few rolls of GRAFSEAL adhesive tape of different widths which will take care of the most of the gasket requirements of the entire plant.
At high temperatures, the adhesive backing carbonizes and becomes an integral part of the gasket itself.

Before using these tapes the following points may be observed:

The flange surface should be thoroughly cleaned to remove rust, foreign particles, grease or oil.

Thereafter, peel of the paper backing six to eight inches and start laying tape on the flange and press against it. When the tape reaches the starting point, lap the tape not more than 2 mm and cut with a sharp knife.

For additional thickness when the starting point is reached, do not cut the tape but roll out the flutes in the already formed gasket with a smooth roller and repeat step 2 above. It is important that the top layer is positioned EXACTLY above the first layer already formed.

Service:
The service conditions are the same as detailed for other GRAFSEAL products.

This Butterfly Valve is lined with Fluoro plastic material at all the surface contact areas for resistance against high corrosive media attacks.

The Seal on Stem of the disc automatically closes.

The unique feature of the sealing of Stem is by a seal ring which completely makes it leak proof under automatic pressure exerted by spring rings.

The main body is split in 2 halves manufactured out of Ductile Iron Castings. The body has holes for fixing the valve with pipelines very conveniently. The valve is a slim body light weight construction for easy and reliable working.

Our design construction on the main body is for better sealing incorporated by special elastomer resiliency.

A specially patented Ball Valve having Teflon/PFA Lining directly moulded on all surfaces having contact with the fluid. The thickness of the lining is calculated to ensure total protection against highly corrosive chemicals for long service life.

Unlike conventional Ball Valves the ball assembly consists of one solid piece without any looseness so that there is no deterioration of lining in the area of Ball Stem Selding. The thickness of the lining is absolutely constant throughout to avoid any deformation of the ball.

This is a two piece valve body construction and for special safety precaution the body end fits deeply into the other part of valves. This specially patented spherical design of the valve body and the body end reduces cavity volume in areas around the ball. Thus minimising retention within this areas to reduce product contamination problems.

Another special feature is that all the valves have a straight cylindrical part and is neither oval nor rectangular,the port section is round, thus ensuring a flow of fluid without any turbulence. The larger port section and high CV Value permit important savings in the construction of piping units.

The gland packing is fully made from PTFE Chevron Rings and is incorporated with springs which keeps continuous pressure on the rings thereby the sealing is absolute.

The valve is designed to withstand temperatures from -45°C to +220°C and is specially lined with an anti-adhesive, self lubricating material with excellent resistance to abrasion and shocks.

Description

Qty.

Material

Body - 1;

1

C.S. /S.S./S.G. IRON

Body - 2

1

C.S. /S.S./S.G. IRON

Ball

1

C.S. /S.S.

Seat Ring

2

PTFE

Top Cover

1

C.S. /S.S.

Hand Lever

1

C.S. /S.S.

Chevron Rings

4 - 6

PTFE

Spring Washers

4 - 10

M.S.

Bush

1

Brass

Allen Bolts

3

M.S. /S.S.

Lock Washer

1

M.S. /S.S.

Allen Bolts

1

M.S. /S.S.

Allen Bolts

4 - 11

M.S. /S.S.

Lining

-

PFA / FEP / MFA

NB

DIN

L ANSI 1

ANSI 2

R

H

15

130

130

108

160

120

20

150

150

117

160

120

25

160

152

127

155

110

40

200

178

165

205

140

50

230

203

178

205

150

80

310

241

203

290

170

100

350

292

229

350

185

Lined Ball Check Valve:
We manufacture special non-return valves in the size range of 25 mm to 100 mm NB in DIN as well as ANSI Standards.
The Body is a two piece construction and is manufactured out of Ductile Iron Castings. The body is completely lined with FEP/PFA for corrosion resistance wherever it contacts corrosive liquid.
The ball inside is made out of fine grade virgin PTFE. When the size is higher than 50 mm it is made out of steel covered with PTFE.
The advantage of this Specially PTFE Covered Steel Ball is no deformation at higher temperature and pressure.

Spitmaan straight through FEP / PFA lined plug valves provide unristricted flow when fully open, and are also operable in a throttled position. The moulded liner assure excellent chemical resistance and long service life.

Spitmaan products are manufactured using latest production methodology backed by continuing quality control form raw materials to finish products to ensure the highest possible quality standards.

Description

Qty.

Material

Allen Bolt

8

M.S. / S.S.

Name Plate

1

S.S.

Cover Plate

1

M.S.

Bolt

1

M.S. / S.S.

Grub Screws

3

M.S. / S.S.

Nut Stud

1

M.S. / S.S.

Bush

1

M.S.

Plate

1

S.S.

Plate

1

PTFE

Handle

1

C.S. / S.S.

Stopper Head

1

C.S. / S.S.

Pusher

1

S.S.

Diaphragm Plate

1

S.S.

Diaphragm

1

PTFE

Wedge Ring

1

PTFE

Lining

-

PFA/FEP/MFA

Upper Cover

1

Investment Casting WCB/CF8/CF8M

Lower Cover

1

Investment Casting WCB/CF8/CF8M

Plug

1

Investment Casting WCB/CF8/CF8M

Body

1

Investment Casting WCB/CF8/CF8M

NB

L

H

F

100

229

140

610

80

203

125

445

50

178

110

445

40

160

100

370

25

127

75

270

Advanced developments in all areas of industry demands high-tech Packings. Through continuous research and experience of more than 35 years with most modern technique and materials, we are able to master all the fields of application while giving highest functional reliability. Stuffing Box packings are renowned quality products and embraces the entire spectrum from consultancy to problem solving to suit your particular application.

Braided from high grade asbestos yarn suitably lubricated and reinforced with stainless steel wire. This is an ideal choice for high temperature valve application and is suitable for service with steam, butane and propane gases, oil vapour, furnace oil etc.
Please state when spindle / rod is STAINLESS STEEL

1933

500oC

A popular packing made from asbestos fibre yarn reinforced with copper wire and suitable lubricants to withstand high pressure and temperature for steam valve.
Please state when spindle / rod is STAINLESS STEEL

1960

680oC

A specially developed braided packing for super sealing jobs made from high grade asbestos fibre yarn reinforced with inconel wire and suitably lubricated. It will function most effectively against super sealing jobs on valve stems in power plants and oil refineries. A well recommended packing for control valves at high pressures and temperatures and various other applications.
Please specify when spindle / rod is STAINLESS STEEL

Asbestos packing manufactured from high grade asbestos yarn impregnated with oil resisting synthetic compound by a controlled process during which each strand is treated with fine graphite and a special grade of lubricant suited for hot and cold oils, solvents, aromatic hydrocarbons, petroleum distillates and oil refinery services.
Please specify when the rod or shaft is STAINLESS STEEL

A combination packing with specially selected fluoropolymer PTFE fibre and chemical resistant inorganic fibre yarn for resisting against corrosive medium and concentrated acids. This construction improves the strength and chemical inertness of the packing. This combination packing is further treated with PTFE suspensoid. This packing can be used against acids, chlorine, in valves, pumps having chrome plated or stainless steel shafts. PH 2-14.

1003

-150o to +300o

A combination packing concentrically braided with special compound to resist hot concentrated alkalies, organic and dilute acids. A very special low friction packing recommended to be used with high speed pumps,agitator shafts, oils, solvents, ammonia solution, concentrated caustics and ketones. PH 2-12.

A 100% pure PTFE packing impregnated with a special chemically inert suspensoid. A good packing for control valves, pumps handling corrosive gases, ammonia, foodsuffs and pharmaceuticals. It is an ideal packing for sealing dryers, mixers and agitators. Due to high tensile strength of the fibre, this packing is best suited to be used in high pressure valves and reciprocating pump applications. PH 0 - 14.

3

-200o to +290o

A PTFE fibrous packing having special DUPLEX BRAID to increase dimensional stability treated with inert high temperature lubricant. This packing is safe, non-toxic and flexible for use on pumps, for concentrated acids, alkalies, oils, solvents and gases. PH 0-14.

Same as above, but reinforced with inconel wire. The heat resistance and conductivity property enables it to be used under arduous conditions. The corrosion resistant wire reinforcement provides the packing to withstand high pressures. An ideal packing for super heated high pressure control valves especially when die formed, apart from other common industrial applications. PH 1 - 12.

66

650o

A 100% pure graphite fibre packing treated with special high temperature lubricant to prevent seepage through the packing. This packing is self lubricating. It eliminates shaft wear because of graphite fibre which has low co-efficient of expansion, high heat conductivity and high temperature resistance. A premium service packing to withstand against acids, alkalis, oils, solvents, steam, fuel oil, hot tar pumps and hydrocarbons. It is universally being used by maintenance technicians to seal the most demanding applications in valves and pumps. PH 0 - 14.

166

-200o to +300o

A combination of synthetic graphite fibre with specially treated PTFE fibre. This packing is widely used in chemical and petrochemical installations for oils, degreasing fluids, concentrated acids, corrosive gases, for resistance at high speeds. PH 0 - 14.

174

-200o to +300o

A most advanced technology packing. A special DUPLEX BRAIDED construction made from synthetic aramid fibre as strong as steel and most flexible, Safely recommended for pumping granular and viscous fluids, even under high pressure condition. This packing is suitable for solvents, abrasive slurries, fuel oil, high pressure dozing pumps, mild acids and alkalies. A most effective packing for refinery, high pressure water injection system and as an anti-extrusion packing. PH 3 - 12.

172

-200o to +280o

This is a cross braided combination packing having pure PTFE fibre with special high pressure resistant fibre filament yarn incorporated in it. This packing is most suitable to all fluids and corrosive chemicals. It has exceptionally good dimensional stability, creep resistance and is non-toxic. Recommended for dairies, food and pharmaceutical industries, refineries and fertilizer plants. This packing can withstand high pressure conditions in both rotary and reciprocating applications. PH 2 - 12.

176

-200o to +300o

A high quality combination packing incorporated with graphite/PTFE fibres and special synthetic fibre to give additional reinforcement of sliding surface and heat dissipation property. It is most suited in centrifugal and reciprocating pumps with high pressure and sliding velocity for abrasive media. It resists hot water, oil, gases, greases, liquid ammonia and carbamate solution under high pressure conditions. PH 3 - 12.

This is specially developed lubricated non-graphited long vegetable fibre braided packing for marine applications. It has been further lubricated with a low friction dry lubricant to enhance antifriction property for use in sea water and fresh or river water applications, water wheel shafts or rubber and stern glands.

2224

150o

The most critical parts to seal in a ship are the stern tubes and the rubber post. With this view in mind, a most reliable packing is specially developed form non-asbestos tough vegetable fibres. The packing is impregnated with lubricants which protect the packing structure. This packing is therefore most suited for use in marine against sea water in rubber posts and stern tubes, oils, weak alkali solutions and in paper plants.

2300

130o

This packing is manufactured form high tensile strength vegetable fibre thoroughly impregnated with a special lubricant and graphite. Suitable for fresh and salt water, pen-stock and heavy duty hydraulic applications

376

130o

A special non-graphited soft natural fibre yarn packing impregnated with first grade lubricant suitable for high speed centrifugal pumps, compressors and refrigerations, D M Water, cooling water and condensate pumps. Owing to the pliable nature of the material used this packing permits free motion of the rod.

374

150o

DUPLEX BRAIDED fine soft vegetable fibre packing self lubricated. Each strand of this packing is specially impregnated with additives along with break-in lubricant having the property of self lubrication and media repelling action. This packing is best suited to seal glands of pumps, valves, handling condensates, demineralised water and for cold and hot hydraulic applications.

3116

130o

A fine natural fibre braided packing impregnated with lubricants and graphite recommended for use on reciprocation and rotary pumps, valve spindles, refrigeration machinery and compressors. The packing presents a smooth surface that will not score shaft or sleeves because the soft fibre constantly absorbs the liquid being pumped and maintains a soft and pliable running face on the shatf.

Aluminium foil, crimpled under mechanical process with high grade lubricants, sealed in layers and folds built around asbestos or non-asbestos rovings. The packing lacks resilence but permits compressibility. Used for high peripheral speeds on rotary crude oil pumps, petroleum distillates, steam compressors, turbines, hot oil valves, brine, hydrocarbons etc. Shafts should be of 500 brinell hardness or over.

146 Metaflex L

300o

A soft white metal foil anti-frictional packing similar in construction as above for high peripheral speed. The packing is soft enough to present the shaft with a bearing alloy that reduces scoring. Recommended for fuel and crude oil, fresh or salt water refrigerator pumps, air compressors, abrasives, crystallizing or congealing liquids such as sugar, asphalt and medium temperature slurries. It is also used as anti extrusion rings in combination with regular braided soft packings.

789 C Ammonia

130o

A soft flexible laminated proofed fabric packing impregnated with lubricants which reduce friction and shaft wear to a minimum. Used extensively in ammonia and refrigerating pumps, compressors and water service.